Cut the potatoes into 1-inch thick rounds, then use a ring mold to cut out cylinder shapes.
Soak the rounds in water for 20 minutes to remove excess starch.
Pat the potatoes dry with paper towels and season with salt.
Heat olive oil in a stainless steel pan over medium-high heat.
Add the potato rounds and cook until golden brown on one side.
Flip the potatoes, add butter, thyme, garlic, and rosemary to the pan.
Let the butter melt and froth, coating the potatoes with flavor.
Pour in the chicken or vegetable stock and transfer the pan to a preheated 400°F (200°C) oven.
Roast for 20 minutes until the potatoes are tender and fully cooked.
Remove from the oven and serve immediately, garnished with extra thyme or rosemary.